/* Copyright (C) 2014 InfiniDB, Inc.

   This program is free software; you can redistribute it and/or
   modify it under the terms of the GNU General Public License
   as published by the Free Software Foundation; version 2 of
   the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
   MA 02110-1301, USA. */

// $Id$
//
/** @file */

#include <cassert>
#include <limits>
using namespace std;

#include <boost/thread/thread.hpp>
#include <boost/thread/mutex.hpp>

#include "we_tablemetadata.h"

namespace WriteEngine
{
/*static*/
boost::mutex TableMetaData::map_mutex;
/*static*/
TableMetaData::TableMetaDataMap TableMetaData::fTableMetaDataMap;

TableMetaData* TableMetaData::makeTableMetaData(uint32_t tableOid)
{
  boost::mutex::scoped_lock lock(map_mutex);
  TableMetaData* instance;
  TableMetaDataMap::const_iterator it = fTableMetaDataMap.find(tableOid);

  if (it == fTableMetaDataMap.end())
  {
    instance = new TableMetaData();
    fTableMetaDataMap[tableOid] = instance;
    return instance;
  }

  return it->second;
}

/* static */
void TableMetaData::removeTableMetaData(uint32_t tableOid)
{
  boost::mutex::scoped_lock lock(map_mutex);
  TableMetaDataMap::iterator it = fTableMetaDataMap.find(tableOid);

  if (it != fTableMetaDataMap.end())
  {
    delete (*it).second;
    fTableMetaDataMap.erase(it);
  }
}

TableMetaData::TableMetaData()
{
}
TableMetaData::~TableMetaData()
{
}

ColExtsInfo& TableMetaData::getColExtsInfo(OID columnOid)
{
  boost::mutex::scoped_lock lock(fColsExtsInfoLock);
  ColsExtsInfoMap::iterator it = fColsExtsInfoMap.find(columnOid);

  if (it != fColsExtsInfoMap.end())
  {
    return it->second;
  }
  else
  {
    ColExtsInfo colExtsInfo;
    fColsExtsInfoMap[columnOid] = colExtsInfo;
    return fColsExtsInfoMap[columnOid];
  }
}

void TableMetaData::setColExtsInfo(OID columnOid, ColExtsInfo colExtsInfo)
{
  boost::mutex::scoped_lock lock(fColsExtsInfoLock);
  ColsExtsInfoMap::iterator it = fColsExtsInfoMap.find(columnOid);

  if (it != fColsExtsInfoMap.end())
  {
    it->second = colExtsInfo;
  }
  else
  {
    fColsExtsInfoMap[columnOid] = colExtsInfo;
  }
}

ColsExtsInfoMap& TableMetaData::getColsExtsInfoMap()
{
  boost::mutex::scoped_lock lock(fColsExtsInfoLock);
  return fColsExtsInfoMap;
}
}  // namespace WriteEngine